Cannot update Grafana dashboards real time in external website

I have embeded one of dashboards into a html page using iframe link I get when I click on share button. Though the data is getting updated in real time inside grafana, my data in not being updated in my html web page. What must I do to get real time data updation in dashboard embedded in external webpage.

my link is something like below:

. I have added &refresh=5s yet no use.

Thank you.